ShaderSourceDetailsProvider.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.ide.eclipse.gltrace.views.detail;

import com.android.ide.eclipse.gltrace.state.GLCompositeProperty;
import com.android.ide.eclipse.gltrace.state.GLStateType;
import com.android.ide.eclipse.gltrace.state.GLStringProperty;
import com.android.ide.eclipse.gltrace.state.IGLProperty;

import org.eclipse.jface.action.IContributionItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;

import java.util.Collections;
import java.util.List;

public class ShaderSourceDetailsProvider implements IStateDetailProvider {
    private Text mTextControl;

    @Override
    public boolean isApplicable(IGLProperty state) {
        return getShaderSourceProperty(state) != null;
    }

    @Override
    public void createControl(Composite parent) {
        mTextControl = new Text(parent, SWT.BORDER| SWT.READ_ONLY
                | SWT.MULTI | SWT.WRAP | SWT.V_SCROLL | SWT.H_SCROLL);
        mTextControl.setEditable(false);
    }

    @Override
    public void disposeControl() {
    }

    @Override
    public Control getControl() {
        return mTextControl;
    }

    @Override
    public void updateControl(IGLProperty state) {
        IGLProperty shaderSrcProperty = getShaderSourceProperty(state);
        if (shaderSrcProperty instanceof GLStringProperty) {
            String shaderSrc = ((GLStringProperty) shaderSrcProperty).getStringValue();
            mTextControl.setText(shaderSrc);
            mTextControl.setEnabled(true);
        } else {
            mTextControl.setText(""); //$NON-NLS-1$
            mTextControl.setEnabled(false);
        }
    }

    /**
     * Get the {@link GLStateType#SHADER_SOURCE} property given a node in
     * the state hierarchy.
     * @param state any node in the GL state hierarchy
     * @return The {@link GLStateType#SHADER_SOURCE} property if a unique instance
     *         of it can be accessed from the given node, null otherwise.
     *         A unique instance can be accessed if the given node is
     *         either the requested node itself, or its parent or sibling.
     */
    private IGLProperty getShaderSourceProperty(IGLProperty state) {
        if (state.getType() == GLStateType.SHADER_SOURCE) {
            // given node is the requested node
            return state;
        }

        if (state.getType() != GLStateType.PER_SHADER_STATE) {
            // if it is not the parent, then it could be a sibling, in which case
            // we go up a level to its parent
            state = state.getParent();
        }

        if (state != null && state.getType() == GLStateType.PER_SHADER_STATE) {
            // if it is the parent, we can access the required property
            return ((GLCompositeProperty) state).getProperty(GLStateType.SHADER_SOURCE);
        }

        return null;
    }

    @Override
    public List<IContributionItem> getToolBarItems() {
        return Collections.emptyList();
    }
}